diff --git a/docs/index.rst b/docs/index.rst
index 6577c43..02ea58b 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -88,12 +88,40 @@ the following:
     Teff = (5770, 80)
     logg = (4.44, 0.08)
     feh = (0.00, 0.10)
-    
+
+    # StarModel needs at least one apparent mag
+    V = (4.86,0.02) # M_V for sun (Peacut and Mamajek 2013)
+
     dar = Dartmouth_Isochrone()
 
-    model  = StarModel(dar, Teff=Teff, logg=logg, feh=feh)
+    model  = StarModel(dar, Teff=Teff, logg=logg, feh=feh, V=V)
+    model.fit()
+    
+    # Distance should come out to 10pc
+
+Adding in a Parallax
+--------------------
+
+
+.. code-block:: python
+
+    #spectroscopic properties (value, uncertainty)
+    Teff = (5770, 80)
+    feh = (0.00, 0.10)
+
+    V = (4.86,0.02) # M_V for sun (Peacut and Mamajek 2013)
+    parallax=(100,1) # Paralax in mas
+    maxAV = 0.01
+    dar = Dartmouth_Isochrone()
+    
+    model  = StarModel(
+        dar, Teff=Teff, feh=feh, V=V, parallax=parallax,maxAV=0.01
+	)
     model.fit()
 
+    # Radius should come out to 1 solar radius.
+
+
 The model now has a ``samples`` property that contains all of the
 samples generated by the MultiNest/MCMC chain in a :class:`pandas.DataFrame`
 object---or more specifically, it contains both the samples generated